JP6946022B2 - Sewage drainage facility - Google Patents

Description

The present invention relates to a sewage drainage facility.

Generally, in a sewage drainage facility in which sewage, wastewater, river water, etc. are temporarily stored in a water tank and drained by a pump, the liquid contains dust and filth. Especially in buildings with underground structures, not only sewage generated in the basement but also sewage generated in the building is temporarily placed in a large drainage tank or sewage tank (also called a pit or building pit) installed underground. May be stored. Since these temporarily stored liquids are located below the public sewer pipe, they are pumped into the sewage basin by a pump installed in the pit and drained to the public sewer pipe through the sewage basin.

As shown in FIG. 12, the basement portion B of the building 100 may be located below the public sewer pipe 80. Conventionally, sewage, miscellaneous drainage, etc. (hereinafter referred to as sewage, etc.) generated in such a basement portion B are temporarily stored in a large drainage tank 85 further below via an inflow pipe 81. After that, the sewage and the like are pumped up to the sewage basin 91 by the drainage pump 90 installed in the drainage tank 85, and drained to the public sewer pipe 80 through the sewage basin 93. In addition, sewage and the like generated on the first floor and above of the building 100 are usually drained directly to the sewage basin 91 under natural flow.

In such equipment, the pump 90 starts operation when the water level in the drain tank 85 reaches a predetermined water level. However, if the water level in the drainage tank 85 does not reach a predetermined water level and sewage or the like remains at the bottom of the drainage tank 85 for a long time, putrefaction progresses and a foul odor is generated from the manhole or the like when the water is discharged to the public sewer pipe 80. May be done.

The above problem is remarkable because the drainage tank 85 is too large, the area of the bottom surface of the water tank is large, and the amount of residual sewage or the like is large. In order to improve this, in the drainage tank 85 shown in FIG. 12, the bottom plate 87 of the drainage tank 85 is provided with a gradient descending toward the drainage pump 90, or the bottom plate 87 of the portion where the pump 90 is installed is provided with a recess 89. doing. Further, the operation method of the pump 90 is improved so that, for example, after the pump 90 is operated to the pump-off water level WL2, the operation of the drainage pump 90 is continued for a predetermined time to reduce the amount of residual sewage or the like as much as possible. I have to.

However, even with the above improvements, the amount of residual sewage and miscellaneous wastewater is still large, and it has not yet been possible to suppress the progress of putrefaction of sewage and miscellaneous wastewater. For this reason, conventionally, a sewage drainage facility in which a tubular water tank (barrel) is arranged in a drainage tank (pit) and a pump is used in the barrel has been proposed.

Patent No. 4455742

In the above-mentioned sewage drainage facility, the diameter of the barrel is designed to match the diameter of the manhole so that the barrel can be carried into the pit through the manhole formed in the pit. That is, since the diameter of the barrel is limited, it is difficult for a plurality of people to enter the barrel, and work such as cleaning or maintenance inside the barrel is complicated.

In addition, a water level sensor may be installed in the barrel to control the start / stop of the pump. As described above, since it is desired to reduce the amount of sewage remaining in the barrel when the pump is stopped, it is preferable that the stop water level at which the pump is stopped is set at a low position. However, since many pumps used in such equipment do not assume that air is sucked from the suction port, the starting water level is required to be set at an appropriate position so that air is not sucked into the pump. Also, regarding the stop water level, frequent start and stop of the pump deteriorates energy efficiency, while on the other hand, it is set at an appropriate position so that a large amount of sewage does not accumulate in the barrel (sewage tank). Is required.

The starting and stopping water levels of the pump are calculated based on the shape of the barrel (sewage tank), the equipment of the building, the performance of the pump, and so on. However, the optimum starting water level and stopping water level for each actual sewage type drainage facility may differ slightly from the calculated water level. For this reason, when actually installing the equipment, the on-site worker adjusts the starting water level and the stopping water level by performing a test operation or the like. However, as described above, the size and shape of the sewage tank installed in the pit are limited, and it may be difficult to visually confirm the current water level in the sewage tank during the test operation.

Further, in the sewage drainage facility, for example, even if the suction port of the pump is clogged with foreign matter and the pump stops abnormally, the inside of the sewage tank cannot be confirmed from the outside, and it is difficult to grasp the cause of the abnormality. There was a case.

The present invention has been made in view of the above points, and an object of the present invention is to provide a sewage drainage facility in which the inside of a sewage tank can be easily visually recognized.

(Form 1) According to Form 1, a sewage drainage facility is provided, and the sewage drainage facility includes a sewage tank for temporarily storing water and a pump for discharging water in the sewage tank, and a side surface of the sewage tank. An opening is formed in the opening, and a transparent window member is provided in the opening.
According to the first aspect, the inside of the sewage tank can be visually recognized through the transparent window member provided in the opening on the side surface of the sewage tank. Therefore, the inside of the sewage tank can be easily visually recognized.

(Form 2) According to Form 2, in the sewage drainage facility of Form 1, the window member is attached to the sewage tank by a fastener, and a sealing member that seals the gap between the window member and the sewage tank. Is further equipped.
According to the second form, the window member can be easily provided in the sewage tank. Further, after the sewage tank is transported into the pit, the window member can be easily attached to the sewage tank in the pit.

(Form 3) According to the third form, the sewage drainage facility of the first or second form is further provided with a lighting device that irradiates the inside of the sewage tank with light.
According to the third embodiment, since the inside of the sewage tank can be irradiated with light by the lighting device, the inside of the sewage tank can be visually recognized more clearly through the window member.

(Form 4) According to Form 4, the sewage drainage facility of Form 3 further includes a transparent or translucent cover that covers the lighting device.
According to the fourth embodiment, the lighting device can be protected from sewage or a gas associated with putrefaction of the sewage.

(Form 5) According to the fifth form, the sewage drainage facility according to any one of the first to fourth forms, wherein a wiping mechanism for wiping the window member is provided inside the sewage tank.
According to the fifth embodiment, the foreign matter adhering to the window member can be removed, and the inside of the sewage tank can be visually recognized through the window member.

(Form 6) According to Form 6, the sewage drainage facility according to any one of Forms 1 to 5, wherein the sewage tank is composed of one or a plurality of barrels and is connected to a suction port of a pump. An opening is formed on the side surface of the barrel or the side surface of the barrel accommodating the pump, and a window member is provided.

(Form 7) According to Form 7, the sewage drainage facility according to any one of Forms 1 to 5, wherein the sewage tank is composed of a plurality of panel members, and at least one of the plurality of panel members is a window member. Is provided.
According to the seventh embodiment, since the sewage tank is formed of a plurality of panel members, the size of the sewage tank can be determined according to, for example, the amount of water flowing into the sewage tank.

(Form 8) According to Form 8, in the sewage drainage facility of Form 7, each of the plurality of panel members has at least the length of the short side on the plate surface equal to or less than the diameter of the opening formed in the pit.
According to the eighth embodiment, the panel member can be carried into the pit through the opening formed in the pit.

(Form 9) According to Form 9, the sewage drainage facility according to any one of Forms 1 to 8, and the sewage tank has an internal space defined by a bottom surface, a side surface, and an upper surface.
According to the ninth form, it is possible to prevent a foul odor from leaking from the sewage tank to the outside.

(Form 10) According to Form 10, in the sewage drainage facility according to any one of Forms 1 to 9, at least a part of the opening is formed at the same height as the suction port of the pump.
According to the tenth aspect, the vicinity of the suction port of the pump can be visually recognized through the window member.

(Form 11) According to Form 11, the sewage drainage facility according to any one of Forms 1 to 10 further includes a water level sensor for detecting the water level in the sewage tank, and the pump has a predetermined stop water level by the water level sensor. The operation is stopped when it is detected that the water level has dropped below the stop water level, and the operation is started when the water level sensor detects that the water level has risen above a predetermined starting water level higher than the stopped water level.
According to the eleventh aspect, the pump can be started and stopped based on the water level sensor provided in the sewage tank. Further, the starting water level and the stopping water level detected by the water level sensor can be set while visually recognizing through the window member, and the pump can be started and stopped more preferably.

(Form 12) According to Form 12, the sewage drainage facility according to any one of Forms 1 to 11, and the sewage tank is housed in a pit which is a drainage tank installed at a position lower than the sewer pipe. It is characterized by that.

It is a figure which shows the structural outline of the malodor prevention type drainage facility which concerns on embodiment. It is an AA view which shows the sewage tank from the AA direction in FIG. It is a figure which shows the structural outline of the lighting apparatus which concerns on embodiment. It is a figure which shows the sewage tank which concerns on the 1st modification. It is a figure which shows the example which the sewage tank is composed of a plurality of panel members. It is a figure which shows typically the carry-in of a panel member into a pit. It is a figure which shows the sewage tank of the 3rd modification. It is a figure which shows the sewage tank of the 4th modification. It is a BB view view of the sewage tank seen from the BB direction in FIG. It is a figure which shows the example which the window member is attached to the sewage tank from the inside of the opening in the 4th modification. In the fourth modification, it is a figure which shows the example in which the support part which supports by sandwiching a window member is formed in the opening of a sewage tank. It is a schematic side sectional view which shows an example of the conventional drainage facility.

(First Embodiment)
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a diagram showing an outline of the configuration of a malodor prevention type drainage facility according to an embodiment of a sewage drainage facility in which sewage, wastewater, river water, etc. are temporarily stored in a sewage tank and drained by a pump. This malodor prevention type drainage facility can be suitably used to discharge the drainage from the basement portion B located at a position lower than the public sewer pipe in a building (for example, a building) to the public sewer pipe 80. However, the sewage drainage facility is not limited to those applicable to such malodor prevention type drainage facilities, and may be any facility that temporarily stores sewage, wastewater, river water, etc. in a sewage tank and drains them with a pump, for example, above ground. May be placed in.

As shown in FIG. 1, the malodor prevention type drainage facility 10 is provided in a pit Pi, which is a drainage tank installed under the basement portion B of a building (for example, a building) 100. An opening (manhole) 24 is formed in the pit Pi, and a lid 25 is attached to the opening 24. The malodor prevention type drainage facility 10 includes a sewage tank 12 provided in the pit Pi, a pump 20 connected to the outlet 16 of the sewage tank 12, and a lighting device 30 provided inside the sewage tank 12. Be prepared. In this embodiment, one sewage tank 12 is provided and one pump 20 is connected.

In this embodiment, a bottomed cylindrical barrel is used as the sewage tank 12. The sewage tank 12 can be formed of, for example, a composite material such as reinforced plastic (FRP) or vinyl chloride, or a polymer material. The sewage tank 12 has an outer diameter (for example, 560 mm) smaller than the diameter Dm (for example, 600 mm) of the opening 24 so that it can be carried into the pit Pi from the opening (manhole) 24 of the pit Pi. In the present embodiment, the sewage tank 12 has an internal space defined by a bottom surface 12a, a side surface 12b, and a top surface 12c. However, the sewage tank 12 may not have a ceiling or a lid, and may be configured so that the upper surface 12c is open. In the present embodiment, the sewage tank 12 has an opening 13 formed on the upper surface 12c, and the opening 13 is covered with a lid 14. An inflow pipe 15 is inserted into the sewage tank 12 through the lid 14. The inflow pipe 15 is piped from the basement portion B, and sewage or the like generated in the basement portion B is allowed to flow into the sewage tank 12. However, the inflow pipe 15 is not limited to the one that penetrates the lid 14 of the sewage tank 12 and the lid 25 of the pit Pi, and may penetrate the side surface 12b or the upper surface 12c of the sewage tank 12 or the side surface of the pit Pi. Alternatively, the pipe may be pierced through the upper surface.

Further, in the present embodiment, the bottom surface 12a of the sewage tank 12 is provided with an outlet 16 for discharging the stored sewage and the like. The outflow port 16 is a concave portion recessed downward on the bottom surface 12a, and is designed so that the lower end of the suction pipe 23 of the pump 20 and the lower end of the outflow port 16 have the same height. By forming the recessed outlet 16 on the bottom surface 12a of the sewage tank 12 in this way, the sewage or the like in the sewage tank 12 is guided to the outlet 16, and when the drainage operation of the pump 20 is completed, the sewage or the like It is possible to suppress the putrefaction in the sewage tank 12 by reducing the residual amount of the wastewater. Further, in the present embodiment, the bottom surface 12a of the sewage tank 12 is provided with an inclination so that the height tends to be higher as the distance from the outlet 16 is higher and the height is lower as the height is closer to the outlet 16. As a result, the sewage or the like in the sewage tank 12 can be more effectively guided to the outlet 16, and the generation of a foul odor can be prevented.

A water level sensor 26 for measuring the current water level is installed in the sewage tank 12. As the water level sensor 26, various sensors such as a float type, an analog type using an electrode rod, and a pressure detection type can be used. The amount of sewage flowing into the sewage tank 12 may be detected instead of the water level sensor 26, and the water level of the sewage tank may be predicted by the control device CN based on the amount of sewage. The water level sensor 26 of the present embodiment is a float type, and has a first float 26a for detecting the stopped water level Hs1 of the pump 20 and a second float 26b for detecting the starting water level Hs2 of the pump 20 having a water level higher than the stopped water level Hs1. And have. Here, the stop water level Hs1 is preferably set at a position higher than the height Hp of the suction port of the pump 20 so that air is not sucked during the operation of the pump 20. Further, as a backup when the first and second floats 26a and 26b fail, a spare float may be provided between the starting water level and the stopping water level.

Further, a peep window 40 is provided on the side surface 12b of the sewage tank 12 so that the inside of the sewage tank 12 can be visually recognized from the outside. In the present embodiment, the peep window 40 is provided on the side surface of the outlet 16 of the sewage tank 12, and is provided in the region including the height Hp of the suction port of the pump 20. Further, in the present embodiment, the peephole 40 is provided in the region including the height at which the first and second floats 26a and 26b of the water level sensor 26 are provided. However, the peephole 40 is not limited to the example shown in FIG. 1, and may be provided only in the vicinity of the outlet 16, for example.

FIG. 2 is an AA view showing the sewage tank 12 from the AA direction in FIG. As shown in FIG. 2, a rectangular opening 12d is formed on the side surface 12b of the sewage tank 12. A peephole 40 is formed by attaching a transparent or translucent window member 42 to the opening 12d from the outside. Specifically, a sealing member 46 corresponding to the shape of the edge of the opening 12d is arranged outside the opening 12d, and a window member 42 is arranged outside the sealing member 46. Then, a frame member 44 is arranged further outside the window member 42, and these are integrally attached by a fastener 48 such as a bolt. The sealing member 46 is formed of, for example, rubber or resin, and is interposed between the sewage tank 12 and the window member 42 to seal the gap between the sewage tank 12 and the window member 42. Further, the frame member 44 is formed of a highly rigid material such as metal to ensure the strength of the peephole 40.

When the window member 42 has sufficiently high rigidity, the window member 42 is processed according to the curved shape of the outer circumference of the sewage tank 12, and when the window member 42 is freely curved, the window member 42 is processed. The window member 42 and the sewage tank 12 may be fixed by the fastener 48 without providing the frame member 44 in accordance with the sewage tank 12 as it is. Further, the fixing to the window member 42 to the sewage tank 12 is not limited to that by the fastener 48, and may be performed by fitting, bonding, welding or the like. Further, instead of or in addition to the sealing member 46 described above, the sewage tank 12 and the window member 42 are brought into contact with each other from the outside of the window member 42 by using an adhesive, a caulking material, or the like, and the sewage tank 12 and the window member 42 are brought into contact with each other. The gap between the sewage tank 12 and the window member 42 may be sealed from the inside of the sewage tank 12. Further, when the sewage tank 12 and the window member 42 are sufficiently in close contact with each other, the sealing member 46 may not be provided.

In the present embodiment, since the window member 42 is attached from the side surface 12b from the outer peripheral side of the sewage tank 12, the volume (internal space) in which the sewage or the like is stored in the sewage tank 12 can be increased. The window member 42 may be attached to the sewage tank 12 in the pit Pi after the sewage tank 12 is carried into the pit Pi. Further, the window member 42 may be attached to the side surface 12 from the inner peripheral side of the sewage tank 12. In this case, the sewage collected in the sewage tank 12 exerts a force in the direction in which the window member 42 comes into contact with the sewage tank 12, so that the sewage or the like leaks from the gap between the sewage tank 12 and the window member 42. Can be suitably prevented.

The explanation is returned to FIG. The pump 20 is a known pump, and is provided to drain the sewage and the like stored in the sewage tank 12 to the outside. As the pump 20, a vertical shaft type pump is used, and the pump 20 is provided outside the sewage tank 12 in the pit Pi. The vertical shaft type pump can be installed in a smaller installation area than the horizontal shaft type pump, and is effective for installation in a limited space in the pit Pi. Further, in the vertical shaft type pump, since the pump 20 is connected above the suction pipe 23, it is possible to prevent sewage or the like in the suction pipe 23 from leaking into the pit Pi when the pump 20 is removed from the suction pipe 23. Therefore, the amount of leakage of sewage or the like during replacement or maintenance is reduced as compared with the horizontal axis pump, and workability is improved. Further, since the motor 21 for driving the pump 20 is installed above the pump 20, even if sewage or the like overflows from the sewage tank 12 and water is stored in the pit Pi, the motor 21 is prevented from being flooded. Can be suppressed. Thereby, the water resistance of the motor 21 can be lowered. However, it is preferable that the motor 21 is waterproofed in case of an unexpected situation such as heavy rain.

In the pump 20, the suction pipe 23 is connected to the suction port, and the discharge pipe 22 is connected to the discharge port. Gate valves 18a and 18b are provided in the suction pipe 23 and the discharge pipe 22 of the pump 20 for replacement and maintenance of the pump 20, respectively. Further, the discharge pipe 22 is provided with a check valve 17. By closing the sluice valves 18a and 18b, the pump 20 can be replaced and maintained without draining the sewage from the sewage tank 12 and the discharge pipe 22. The check valve 17 may be provided in the suction pipe 23 in place of or in addition to the discharge pipe 22.

The lighting device 30 is provided in the sewage tank 12 so that the sewage tank 12 can be irradiated with light. FIG. 3 is a diagram showing an example of the lighting device 30 according to the present embodiment. As shown in FIGS. 1 and 3, in the present embodiment, the lighting device 30 is attached to the ceiling portion (upper surface 12c) of the sewage tank 12. However, the lighting device 30 may be attached to the side surface 12b of the sewage tank 12 so that the maintenance inside the sewage tank 12 can be facilitated.

The lighting device 30 includes a lamp 31 and a shield tube (cover) 32 that covers the lamp 31. Further, the lighting device 30 includes a support member 33 for fixing the shield pipe 32 to the upper surface 12c of the sewage tank 12, and an O-ring 34 provided between the support member 33 and the shield pipe 32. There is. Further, the lighting device 30 includes a haumetic seal 35 for sealing the power line 31a of the lamp 31 and a support member 36 for fixing the haumetic seal 35 to the upper surface 12c of the sewage tank 12. ..

As the lamp 31, a known fluorescent lamp, LED, or the like can be used. The power line 31a of the lamp 31 is connected to an external power source or a control device CN (not shown), and the lamp 31 lights up in response to a control signal from the control device CN. In the present embodiment, the lamp 31 can irradiate the sewage tank 12 with white light having a predetermined amount of light, but the amount of light and the color tone may be changed. The lamp 31 is covered by a shield tube 32. The shield tube 32 is made of a transparent or translucent material such as glass or acrylic and is formed in a bottomed cylindrical shape. In the present embodiment, the jig 32a is provided in the shield tube 32, and the lamp 31 is held in the shield tube 32 by the jig 32.

In the shield pipe 32, the support member 33 is fixed to the upper surface 12c of the sewage tank 12 via fasteners such as screws, and the support member 33 supports the shield pipe 32 to be supported by the upper surface 12c of the sewage tank 12. .. In the present embodiment, a sealing material 33a is provided on the contact surface between the upper surface 12c of the sewage tank 12 and the support member 33, and an O-ring 34 is provided between the support member 33 and the shield pipe 32. There is. With such a configuration, it is possible to prevent the lamp 31 in the shield tube 32 from being exposed to sewage or the like or a gas generated from the sewage or the like. Further, the power line 31a from the lamp 31 is provided with a haumetic seal 35. That is, the power line 31a is sealed in a metal plate via a glass body. Further, the haumetic seal 35 of the power line 31a is fixed to the upper surface 12c of the sewage tank 12 via the support member 36. With such a configuration, it is possible to further prevent sewage, gas, or the like from entering the shield pipe 32. The configuration of the lighting device 30 is not limited to the example shown in FIG. 3, and various methods can be used. For example, the power line 31a from the lamp 31 may be sealed with a seal resin instead of the haumetic seal 35.

By providing the lighting device 30 in the sewage tank 12 in this way, it is possible to irradiate the inside of the sewage tank 12 with light, and it is possible to improve the visibility inside the sewage tank 12 through the peephole 40. .. In the present embodiment, the lamp 31 (lighting device 30) is provided at a position higher than the starting water level of the pump 20. As a result, it is possible to prevent the lighting device 30 from being exposed to water, and it is possible to increase the capacity of the sewage tank 12 below the starting water level. However, the lamp 31 may be provided at a position lower than the starting water level of the pump 20, and may be particularly provided at the same height as the peephole 40. In this case, since the light of the lamp 31 is irradiated at a position close to the peep window 40, the visibility in the sewage tank 12 through the peep window 40 is further improved.

The explanation is returned to FIG. A control device CN that controls the operation of the pump 20 and the lighting device 30 is installed in the basement portion B. Although not shown, the control device CN displays, for example, a CPU as a calculation unit, a ROM for storing a processing program and various setting values, a RAM for temporarily storing data, and a state of the pump 20 and the sewage tank 12. The display unit may be provided, and an operation unit for performing operations for changing start / stop commands of the pump 20 and various set values may be provided. Further, the control device CN may be a control panel composed of only a relay sequence without using a CPU, ROM or RAM.

This control device CN has an input unit CNin for inputting an external signal. The input unit CNin is composed of a plurality of terminals or connectors. As an example, an input unit CNin1 to which a signal relating to the stop of the pump 20 is input and an input unit CNin2 to which a signal relating to the start of the pump 20 are input are provided. Have. In the present embodiment, the contact signal of the first float 26a of the water level sensor 26 is input to the input unit CNin1, and the contact signal of the second float 26b of the water level sensor 26 is input to the input unit CNin2. Further, the control device CN has an output unit CNout1 that outputs an operation control signal of the pump 20, and an output unit Cnout that outputs a lighting control signal of the lamp 31 of the lighting device 30. The control device CN turns on the lamp 31, for example, when the control mode is set to the test run, or when the user operates the operation unit.

In such a malodor prevention type drainage facility 10, first, sewage or the like generated in the basement portion B is accumulated in the sewage tank 12 via the inflow pipe 15. When the water level sensor 26 detects that the water level in the sewage tank 12 has reached the starting water level Hs2 or higher (the second float 26b is turned ON), an ON signal is input to the input unit CNin2 of the control device CN. The control device CN outputs a control command for starting the operation of the pump 20 from the output unit CNout1 when the ON signal of the second float 26b is input to the input unit CNin2. As a result, the pump 20 sucks sewage or the like through the outlet 16 of the sewage tank 12 and the suction pipe 23 of the pump 20, and drains the sewage or the like through the discharge pipe 22 to the sewage sewage 91. The sewage and the like drained to the sewage sewage 91 is drained to the public sewer pipe 80 via the sewage sewage 93. When the water level sensor 26 detects that the water level in the sewage tank 12 has fallen below the stop water level Hs1 (the first float 26a is OFF), an OFF signal is input to the input unit CNin1 of the control device CN. The control device CN outputs a control command for stopping the operation of the pump 20 from the output unit CNout1 when the OFF signal of the first float 26a is input to the input unit CNin1. As a result, the pump 20 is stopped.

In the malodor prevention type drainage facility 10 of the embodiment described above, since the opening 12d is formed in the sewage tank 12 and the peephole 40 is provided, the inside of the sewage tank 12 can be visually recognized through the peephole 40. Moreover, in the present embodiment, since the lighting device 30 that irradiates the sewage tank 12 with light is provided, the visibility inside the sewage tank 12 can be further improved. As a result, for example, the work when setting the start water level and the stop water level of the pump 20 becomes easy, and the start water level and the stop water level can be set at suitable positions. Further, when an abnormality has occurred in the malodor prevention type drainage facility 10, the inside of the sewage tank 12 can be easily confirmed.

(First modification)
FIG. 4 is a diagram showing a sewage tank 12 according to the first modification. The sewage tank 12 of the first modification includes, in addition to the configuration of the sewage tank 12 of the embodiment, a wiping mechanism 50 for removing foreign matter adhering to the window member 42. As the wiping mechanism 50, for example, a known wiper or scraper that comes into contact with the inner surface of the window member 42 can be used. By providing such a wiping mechanism 50, it is possible to remove foreign matter adhering to the window member 42 and improve the visibility in the sewage tank 12 through the window member 42. In the example shown in FIG. 4, the wiping mechanism 50 is provided with a handle 52 outside the sewage tank 12, and is manually operated by operating the handle 52. However, the wiping mechanism 50 may be connected to the control device CN and operate in response to a signal from the control device CN.

(Second modification)
FIG. 5 is a diagram showing an example in which the sewage tank 12 is composed of a plurality of panel members 120. In FIG. 5, a part of the panel member 120 is omitted. Further, FIG. 6 is a diagram schematically showing the carry-in of the panel member into the pit. As shown in FIG. 5, the sewage tank 12 of the second modification is configured by connecting a plurality of panel members 120. Each of the plurality of panel members 120 defines the bottom surface 12a, the side surface 12b, and the top surface 12c of the sewage tank 12.

The plurality of panel members 120 are formed of, for example, resin or metal. Further, the panel member 120 may be formed of a plurality of layers of materials, and may be formed by laminating, for example, a fiber reinforced plastic (FRP) having excellent heat insulating properties, a synthetic resin foam, a synthetic resin exterior, or the like. good. Each of the plurality of panel members 120 has a side length Lp smaller than the diameter Dm of the opening 24 so that it can pass through the opening (manhole) 24 formed in the pit Pi. For example, in the present embodiment, the opening 24 of the pit Pi is a columnar shape having a diameter Dm of 600 mm, and each of the plurality of panel members 120 has a plate surface smaller than the diameter Dm and is approximately 500 mm square. However, the plurality of panel members 120 do not have to have the same plate surface shape, and even if the panel member 120 defining the bottom surface and the panel member 120 defining the side surface have different sizes, for example. good. Further, the panel member 120 is not limited to the one in which the length of each side of the plate surface is smaller than the diameter Dm of the opening 24, and the long side of the plate surface may be larger than the diameter Dm and the short side may be smaller than the diameter Dm. .. By determining the size of the panel member 120 in this way, as shown in FIG. 6, the panel member 120 can be carried into the pit Pi from the basement portion B through the opening 24.

Further, in the example shown in FIG. 5, an opening is formed in the specific panel member 120 to provide the peephole 40. However, the peephole 40 may be provided across the plurality of panel members 120. Also in such a second modification, the inside of the sewage tank 12 can be visually recognized through the peephole 40 as in the sewage tank 12 of the embodiment.

(Third modification example)
FIG. 7 is a diagram showing a sewage tank 12 of the third modified example. In the sewage tank 12 of the third modification, the pump 20 is provided inside the sewage tank 12. As the pump 20, a submersible pump that can be driven while the pump 20 is immersed in sewage or the like is used. The pump 20 has a suction port provided in the sewage tank 12, and drains sewage or the like into the sewage tank through a discharge pipe 22 that is connected to the discharge port and communicates with the outside of the sewage tank 12. Even in such a third modification, since the peephole 40 is provided in the sewage tank 12, the inside of the sewage tank 12 can be visually recognized through the peephole 40. As a result, especially when an abnormality occurs in the pump 20, the inside of the sewage tank 12 can be visually confirmed and the cause of the abnormality can be easily confirmed.

(Fourth modification)
FIG. 8 is a diagram showing the sewage tank 12 of the fourth modified example, and FIG. 9 is a BB view of the sewage tank 12 as viewed from the BB direction in FIG. In the sewage tank 12 of the fourth modification, the lid 14 is attached to the upper end of the bottomed cylindrical barrel. The lid 14 is opened when the inside of the sewage tank 12 such as the pump 20 is maintained, and is normally closed. With such a lid 14, it is possible to prevent the sewage in the sewage tank 12 from scattering to the outside of the sewage tank 12. It is preferable that the lid 14 is provided with a ventilation hole or is loosely fitted to the sewage tank 12 so that the sewage tank 12 is not sealed.

Further, the sewage tank 12 of the fourth modification includes band members 54 and 56 that are fastened around the side surface of the sewage tank 12. The band members 54 and 56 are provided in order to increase the strength of the sewage tank 12 and prevent the window member 42 from coming off due to the pressure received from the liquid in the sewage tank 12. In the example shown in FIG. 8, the band members 54 and 56 are attached to the sewage tank 12 at two different heights, but the band members 54 and 56 may be one or three or more. As the band members 54 and 56, for example, band-shaped metal, leather, cloth, resin, or the like can be used. Then, as an example, as shown in FIG. 9, the band members 54 and 56 are attached to the sewage tank 12 by going around the side surface of the sewage tank 12 and fastening the ends with fasteners (for example, bolts and nuts) 57. Be done. Further, in the example shown in FIG. 9, the band member 54 located below is fixed to the gantry 19 of the sewage tank 12 via the auxiliary band member 55. The auxiliary band member 55 is fixed to each of the gantry 19 and the band member 54 by fasteners (for example, anchor bolts, bolts and nuts) (not shown). As a result, the band member 54 and the auxiliary band member 55 also have the effect of fixing the sewage tank 12 to the gantry 19, and prevent the sewage tank 12 from floating when water overflows into the pit Pi, for example. However, the present invention is not limited to the example shown in FIG. 8, and the band member 54 may not be fixed to the gantry 19 via the auxiliary band member 55. Further, the upper band member 56 may also be fixed to the band member 54 or the gantry 19 via the auxiliary band member 55.

In the example shown in FIG. 9, the window member 42 is attached to the sewage tank 12 from the outside of the opening 12d, and projects outward from the outer peripheral surface of the sewage tank 12. In such a case, as shown in FIG. 9, the band members 54 and 56 preferably have irregularities according to the shape of the window member 42. Further, in the example shown in FIG. 9, the window member 42 and the sewage tank 12 are adhered to each other by an adhesive 47 that also serves as a seal. However, the window member 42 and the sewage tank 12 may be attached to each other by using at least one of the sealing member 46, the fastener 48, and the frame member 44 as in the above-described embodiment. Further, FIG. 10 is a diagram showing an example in which the window member 42 is attached to the sewage tank 12 from the inside of the opening 12d in the fourth modification. As shown in FIG. 10, by making the outer peripheral surface of the window member 42 flush with the outer peripheral surface of the sewage tank 12, the band members 54 and 56 are not uneven, and the band members 54 and 56 are placed in the sewage tank 12. Can be suitably attached to.

FIG. 11 is a diagram showing an example in which a support portion 12e for sandwiching and supporting the window member 42 is formed in the opening 12d of the sewage tank 12 in the fourth modification. In the example shown in FIG. 11, the support portion 12e
Is formed in a U shape at the left and right ends of the opening 12 so that the window member 42 can be fixed by sandwiching the outer peripheral surface and the inner peripheral surface. A support portion 12e may also be formed at the lower end portion of the opening 12d. Further, in the example shown in FIG. 11, the support portion 12e is formed so as to project inside the side surface of the sewage tank 12, but instead of or in addition to this, the support portion 12e is formed so as to project outside the side surface of the sewage tank 12. May be done. Further, when the sewage tank 12 is sufficiently thick, the support portion 12e may be formed by cutting out a part of the opening 12d.

Further, in the above-described embodiment and modification, the opening 12d is provided on a part of the side surface of the sewage tank 12, but the opening 12d may be formed so as to extend to the upper end of the sewage tank 12. In this case, particularly in the example shown in FIG. 11, by inserting the window member 42 downward from the upper end of the sewage tank 12, the window member 42 can be attached to the sewage tank 12, and the assembly workability is improved. Further, in this case, it is preferable that the lid 14 is fitted to the upper end of the sewage tank 12 so as to reinforce the upper end of the sewage tank 12.

(Other variants)
In the above-described embodiment and the first to fourth modifications, one sewage tank 12 and one pump 20 are provided in the pit Pi. However, the malodor prevention type drainage facility may be provided with two (two) or more sewage tanks 12 in the pit Pi, or may be provided with two or more pumps 20. Further, a plurality of pumps 20 may be connected to the specific sewage tank 12, or pumps 20 may be connected to each of the plurality of sewage tanks 12. When a plurality of sewage tanks 12 are provided, the sewage tanks 12 may be connected in series with or in parallel with the sewage tank 90. When a plurality of sewage tanks 12 are provided, the peephole 40 may be provided only in the sewage tank 12 to which the suction port of the pump 20 is connected, or only in the sewage tank 12 accommodating the pump 20. However, it may be provided in each of the plurality of sewage tanks 12. Regarding the capacity and number of the sewage tank 12, it is possible to store water corresponding to the inflow amount of sewage according to the scale of the building and the amount of water used in the basement portion B, and a spare capacity is provided. It should be decided so that it can be done.

Further, the malodor prevention type drainage facility may be provided with a spare pump in the pit Pi in addition to the pump 20 connected to the sewage tank 12. The spare pump has a suction port at the lower end and drains water such as sewage stored in the pit Pi to the outside (sewage sewage 91, etc.). The spare pump is activated when sewage overflows from the sewage tank 12 due to, for example, localized heavy rain. As the spare pump, the existing pump in the pit Pi may be left and used. When the pump 20 connected to the sewage tank 12 is a vertical pump, the height of the suction port of the spare pump is lower than the height of the motor 21 of the pump 20, and the starting water level of the spare pump is pumped. It is preferably lower than the height of the motor 21 of 20. By doing so, even if water is stored in the pit Pi, the motor 21 of the pump 20 does not infiltrate while the spare pump can drain the water, so that the waterproof measures of the motor 21 can be simplified.

Although the embodiments of the present invention have been described above, the above-described embodiments of the invention are for facilitating the understanding of the present invention and do not limit the present invention. The present invention can be modified and improved without departing from the spirit thereof, and it goes without saying that the present invention includes an equivalent thereof. In addition, any combination of embodiments and modifications is possible within a range that can solve at least a part of the above-mentioned problems, or a range that produces at least a part of the effect, and is described in the claims and the specification. Any combination of each component or omission is possible.

B ... Basement part Pi ... Pit CN ... Control device CNin ... Input part CNout ... Output part 10 ... Odor prevention type drainage equipment 12 ... Sewage tank 12a ... Bottom surface 12b ... Side surface 12c ... Top surface 12d ... Opening 13 ... Opening 14 ... Lid 15 ... Inflow pipe 16 ... Outlet 17 ... Backflow prevention valve 18 ... Partition valve 19 ... Stand 20 ... Pump 21 ... Motor 22 ... Discharge pipe 23 ... Suction pipe 24 ... Opening 25 ... Lid 26 ... Water level sensor 26a ... First float 26b ... 2nd float 27 ... Cover 30 ... Lighting device 31 ... Lamp 32 ... Shield pipe 40 ... Peeping window 42 ... Window member 50 ... Wiping mechanism 52 ... Handle 120 ... Panel member

Claims (11)

A sewage tank that temporarily stores water and
A pump that discharges water from the sewage tank and
With
Wherein a side surface of the sewage tank has an opening is formed, and a transparent or translucent window member is provided in said opening,
The sewage tank is composed of a plurality of panel members.
The window member is provided on at least one of the plurality of panel members.
A lighting device arranged inside the sewage tank is further provided.
Sewage drainage facility. The window member is attached to the sewage tank by a fastener, and the window member is attached to the sewage tank.
A sealing member for sealing the gap between the window member and the sewage tank is further provided.
The sewage drainage facility according to claim 1. Further comprising a transparent or translucent cover covering the luminaire.
The sewage drainage facility according to claim 1 or 2. A wiping mechanism for wiping the window member is provided inside the sewage tank.
The sewage drainage facility according to any one of claims 1 to 3. The sewage tank is composed of one or a plurality of barrels, and the opening is formed on the side surface of the barrel connected to the suction port of the pump or the side surface of the barrel accommodating the pump. A window member is provided,
The sewage drainage facility according to any one of claims 1 to 4. The sewage tank is housed in a drainage tank.
Each of the plurality of panel members has at least the length of the short side on the plate surface equal to or less than the diameter of the opening formed in the drainage tank.
The sewage drainage facility according to claim 5. The sewage tank has an internal space defined by a bottom surface, side surfaces, and an upper surface.
The sewage drainage facility according to any one of claims 1 to 6. The plurality of panel members include a panel member that defines the bottom surface of the sewage tank, a panel member that defines the side surface of the sewage tank, and a panel member that defines the upper surface of the sewage tank.
The sewage drainage facility according to claim 7. The opening is formed at least in part at the same height as the suction port of the pump.
The sewage drainage facility according to claims 1 to 8. Further equipped with a water level sensor for detecting the water level in the sewage tank,
The pump stopped operation when the water level sensor detected that the water level had dropped below the predetermined stop water level, and the water level sensor raised the water level above the predetermined start water level higher than the stop water level. Starts when it is detected,
The sewage drainage facility according to any one of claims 1 to 9. The sewage drainage facility according to any one of claims 1 to 10 , wherein the sewage tank is housed in a pit which is a drainage tank installed at a position lower than a sewer pipe.

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